f3: Test real flash memory capacity

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    2025-01-27 11:00           0 usr/share/doc/
    2025-01-27 11:00           0 usr/share/doc/f3/
    2025-01-27 11:00       12130 usr/share/doc/f3/LICENSE.gz
    2025-01-27 11:00        4412 usr/share/doc/f3/README.rst.gz
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    2025-01-27 11:00           0 usr/share/doc/f3/examples/
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